Fertiliser Spreader

4 Tonne

4 Tonne

New Zealand’s favourite spreader.

Known for practical design and easy to use operation, SAM Fertiliser Spreaders are developed from over 70 years’ experience. The features in today’s machines are the benchmark for fertiliser spreading throughout New Zealand.

Choose a SAM Spreader for extreme reliability and mega-solid construction. They provide an accurate spread pattern, with ease of operation and fast spare-parts servicing.

SAM Fertiliser Spreaders are capable of spreading all chemical fertiliser. Including; superphosphate, urea and lime between 40kg - 2500kg/hectare. With spreading widths of up to 20m (superphosphate).

They are available in single or tandem axle with capacities of 4, 5 and 6 tonne. All come standard with a 400mm wide floor-belt (400 series).

Keep it simple with a hydraulic clutch to standard ground drive, or upgrade to the latest smart, accurate computer control system with weigh scales.

Smart features

  • More stainless for longevity
    More stainless for longevity

    Majority stainless at the rear of the machine, extends longevity of gear where you need it most. The stainless discs are run via enclosed stainless spinner tubes and two well-proven hydraulic motors. Easily adjustable tapered roller bearings keep disks tight.

  • Corrosion resistant paintwork
    Corrosion resistant paintwork

    All chassis's on SAM Spreaders have seen a new evolution of painting procedure. This is for extra corrosion protection. Firstly a steel grit abrasive blast then a thermal-arc pure zinc spray, a primer followed by a final two-pot epoxy top-coat. It is mega tough stuff!

  • Strong plastic bin
    Strong plastic bin

    The polyethelyne plastic bin has proven to be extremely reliable. They are strong, corrosion resistant and UV-stabilised. Fertiliser also slips down the sides and washes off easily when you are cleaning your gear.

  • Even, accurate spread
    Even, accurate spread

    The SAM twin spinner disc design gives an accurate and consistent spread pattern across a range of products. Quick and simple rate setting is by adjusting the rear door.

  • features002 Load cell S 1
    Load weigh scales

    You can add scales to your spreader. This gives simple, accurate electronic weighing of your Fertiliser. And can be zeroed out any time. More info below.

  • Computer control box 1 Computer control box 2 1
    Computer control system

    You can also add a computer control system to replace the standard ground drive. More info below.

  • Less cleaning with mudguards!
    Less cleaning with mudguards!

    Mudguards are moulded from UV-stabilised polyethylene, and resistant to most chemical and organic fertilisers. Debris chips to the chassis and running gear are reduced and less cleaning required. Mudguards come standard on all tandem axle models below 8 tonne.

  • Patterned rubber floor-belt (400mm wide)
    Patterned rubber floor-belt (400mm wide)

    Provides a positive non-slip feed of fertiliser onto the spinner discs. A patterned two-ply rubber floor-belt is riveted to hot-dip galvanised steel bars, welded to high-tensile chain. Stainless skirts run alongside.

  • Protective mesh
    Protective mesh

    Stops large objects dropping down and damaging the belt and gear.

  • App for verifying rates
    App for verifying rates

    A great check against your back door setting to verify exactly what you are spreading. This is for use with Spreaders fitted with load cells. Contact us and we will send you the link. Currently Android only.

Optional extras

  • Roll-top cover
  • Standard cover
  • Swivel coupling
  • Tyre upgrade
  • Topcon computer control system (NEW)
  • Whitehead computer control system
  • Load weigh scales
  • LED Lights & flags
Roll Top Feature 1
Roll-top cover

Upgrade to an easy to use roll top cover. This is a simple canvas, frame and bungy system. The handle rolls your cover up, tucked out of the way when not in use.

It is mounted on the rear of the machine so you can load from both sides.

Standard cover 1
Standard cover

The standard cover is manually thrown across the load and fixed in place with bungys. Keeping it simple.

Swivel coupling S 2
Swivel coupling

Smaller spreaders come standard with a fixed coupling. The 6, 8 and 9 tonne spreaders come standard with a heavy-duty swivel coupling.

Swivel couplings can be added to smaller machines if required. They are great for varied terrain. You can choose a donut eye for coupling with a quick hitch or the ball option for tractor coupling.

Tyres 2
Tyre upgrade

We have tough high performing tyres to suit any application. They are chosen for their quality and durability. 

We can change tyre sizes to suit your specific needs. The 4 and 5 tonne tandem spreaders use 11.5 x 15.3 tyres but these can be upgraded to larger 400 x 15.5 tyres. The 400 x 15.5 tyres are standard on the 6 tonne spreaders but can be upgraded to the 500 x 17 tyres.

550/60 x 22.5 tyres are an option on all single-axle models. These larger tyres can be excellent if you have softer, wetter conditions. 

Topcon computer control system (NEW)

Adding the new Topcon Athene computer control system means the correct application rate is applied regardless of changes in forward speed or changes in product density. 

By adding the load weigh scales too, the weight of product in the bin is integrated, allowing dynamic rate control. It is continuously using the weight of product in the bin to check spread rate accuracy.

This computer control system is ISOBUS compatible so can function with many modern tractor consoles 

Find out more

Whitehead computer control system

The Whitehead V3 computer control system can be installed in any of our Spreaders to replace the standard ground drive. This computer keeps the hydraulic driven floor-belt turning independent to the forward speed of the Spreader. Rates can be controlled from the screen inside the cab.

After setup, the V3 controller requires a few quick inputs; fertiliser density, spread width and spread rate.

This brand of computer control system has been chosen for its fantastic track record within the trucking industry. They are number one in their field and have excellent back up service should it ever be required.

If variable rate spreading is required (changing spread rates automatically on the move from uploaded fertiliser mapping) then the the SAM Fertiliser Spreader must be computer controlled combined with the TracMap Pro or similar GPS.

Sometimes there is a misconception that a computer driven Spreader will include as standard a GPS display with light bar guidance and proof of placement software. These components can be easily supplied by third party providers (e.g. TracMap, Trimble) so are not supplied as a standard part of a computer controlled Spreader.

Load cell S 1
Load weigh scales

Load weigh scales give an accurate measure of the weight of feed in the bin. They can be zeroed at any time. A fixed Iconix FX15 display unit is supplied with all SAM machines fitted with weigh scales. 

A simple calculation of the weight of feed spread, divided by the area covered, gives a very accurate spread rate (in kg/ha).

Many new tractors have an inbuilt display that will give area covered at certain spread widths.

A simple App for Bluetooth viewing is also available (currently Android only). This App allows you to verify your spread rate at any time.

Lights and flags S 1
LED Lights & flags

If you are using your machine on the road you will need a set of lights and flags. The flexi mounting boards are made from durable plastic, hardy for knocks and general wear and tear.

Weatherproof lights are LED and plug directly into your power source.

Roll Top Feature 1
Standard cover 1
Swivel coupling S 2
Tyres 2
  • Fertiliser Spreaders can travel very slowly while spreading at a very high rate (spreading shavings into sheds etc.).
  • Can be upgraded by adding a TracMap Pro to provide variable rate spreading. The desired spread rate changes automatically from one area of a paddock to another.
  • Your Spreader can unload without moving forward.
  • Tractor must have higher oil flows (approx 100 litres per minute).
  • Most suited to operation behind one tractor as the power supply is hard-wired.
  • Operators need more training.
  • Electronics fitted on Fertiliser Spreaders need more care.
  • Higher purchase cost.
Load cell S 1
Lights and flags S 1


  • Axle type 70mm stub on 400 x 15.5 or 80mm stub on 550 x 22.5
  • Axle capacity 6,000kg or 8,000kg
  • Wheel type 400/60 x 15.5 or 550/60 x 22.5
  • Jack type 70mm screw jack
  • Length 4.7m
  • Width 2.4m or 2.6m
  • Height 1.9m or 2m
  • Bin width 2.15m
  • Bin length 4.7m
  • Capacity 3.2m3
  • Superphosphate 4T
  • Lime 5.5T
  • Urea 2.6T

Fast central support service

Our SAM range is backed by a quick and efficient support service from central Hamilton. The team are also available for technical help should you need it.

Our guarantee

We deliver quality products and stand by them. All Spreaders go through rigorous quality and accuracy testing. They also have a comprehensive warranty.

Download the brochure
My SAM is the machine I use the most throughout the year (aside from my tractor). It never lets me down.
Of-course I have a SAM - you'd be nuts not too!
If anything needs sorting with my spreader, the parts team sort me out quickly and the prices are reasonable
No extras I don't need that are going to cause me headaches over the years
I have always had SAM gear, and probably always will
my grandad had one, my dad had a few and now I am making the same call for good reason
SAM's get great resale
Thousands of tonnes a year and she never misses a beat

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